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Photometric determination of dissolved oxygen with iron(II) cacotheline oxalate blue

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Abstract

Iron (II)-cacotheline-oxalate blue solution is used as reductometric reagent for the estimation of dissolved oxygen. By titrating the blue complex solution photometrically, the dissolved oxygen in water samples can be accurately determined in the range of 2 to 8 mg/l. The stoichiometry of the reaction between dissolved oxygen and the blue complex was found to be 1:0.8 or 5:4. The applicability of this method to distilled water, river water and reservoir water was tested.

The Winkler's method [1] and its various modifications and adaptations, widely used for the determination of dissolved oxygen, are laborious and time consuming. Therefore a new method using iron (II)-cacotheline-oxalate (ICO) blue solution was developed for this purpose.

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References

  1. Winkler LW (1888) Chem Ber 22:2843–2855

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  2. Alsterberg G (1925) Biochem J 159:36–47

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Author notes

  1. D. R. R. Sarma

    Present address: Parivesh Bhawan, Central Pollution Control Board, Communication East Arjunnagar, 110032, Delhi, India

Authors and Affiliations

  1. Department of Engineering Chemistry, Andhra University, 530003, Visakhapatnam, India

    N. Krishna Murthy

  2. Public Health and Environmental Engineering Laboratories, Department of Civil Engg., Andhra University, 530003, Visakhapatnam, India

    S. L. Narasimha Rao & D. R. R. Sarma

Authors
  1. N. Krishna Murthy
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  2. S. L. Narasimha Rao
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  3. D. R. R. Sarma
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Murthy, N.K., Narasimha Rao, S.L. & Sarma, D.R.R. Photometric determination of dissolved oxygen with iron(II) cacotheline oxalate blue. Fresenius J Anal Chem 351, 586–587 (1995). https://doi.org/10.1007/BF00322739

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  • DOI: https://doi.org/10.1007/BF00322739

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